Vulnerability · Published Oct 23, 2020 · Assigned by eclipse

CVE-2020-27216

High 7.0

In plain English

A high-severity security flaw in Eclipse Jetty from The Eclipse Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.4% (higher than 91% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.0High
Exploit odds (30 days)4.4%top 8.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12jetty99.4.33-1DEBIAN-CVE-2020-27216
Debian:13jetty99.4.33-1DEBIAN-CVE-2020-27216
Debian:14jetty99.4.33-1DEBIAN-CVE-2020-27216
Mavenorg.eclipse.jetty:jetty-webapp11.0.0.beta3GHSA-g3wg-6mcf-8jj6
Mavenorg.eclipse.jetty:jetty-webapp10.0.0.beta3GHSA-g3wg-6mcf-8jj6
Mavenorg.eclipse.jetty:jetty-webapp9.4.33.v20201020GHSA-g3wg-6mcf-8jj6
Mavenorg.mortbay.jetty:jetty-webapp11.0.0.beta3GHSA-g3wg-6mcf-8jj6
Mavenorg.mortbay.jetty:jetty-webapp10.0.0.beta3GHSA-g3wg-6mcf-8jj6
Mavenorg.mortbay.jetty:jetty-webapp9.4.33GHSA-g3wg-6mcf-8jj6

Affected products (as reported)

VendorProductVersions
The Eclipse Foundation Eclipse Jetty 1.0 to 9.4.32.v2020093010.0.0.alpha1 to 10.0.0.beta211.0.0.alpha1 to 11.0.0.beta2

Weakness: CWE-378, CWE-379

References